mirror of https://github.com/webpack/webpack.git
1292 lines
39 KiB
JavaScript
1292 lines
39 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const crypto = require("crypto");
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const { STAGE_ADVANCED } = require("../OptimizationStages");
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const WebpackError = require("../WebpackError");
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const { requestToId } = require("../ids/IdHelpers");
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const { isSubset } = require("../util/SetHelpers");
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const SortableSet = require("../util/SortableSet");
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const {
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compareModulesByIdentifier,
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compareIterables
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} = require("../util/comparators");
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const deterministicGrouping = require("../util/deterministicGrouping");
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const contextify = require("../util/identifier").contextify;
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const MinMaxSizeWarning = require("./MinMaxSizeWarning");
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/** @typedef {import("../../declarations/WebpackOptions").OptimizationSplitChunksCacheGroup} OptimizationSplitChunksCacheGroup */
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/** @typedef {import("../../declarations/WebpackOptions").OptimizationSplitChunksGetCacheGroups} OptimizationSplitChunksGetCacheGroups */
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/** @typedef {import("../../declarations/WebpackOptions").OptimizationSplitChunksOptions} OptimizationSplitChunksOptions */
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/** @typedef {import("../../declarations/WebpackOptions").OptimizationSplitChunksSizes} OptimizationSplitChunksSizes */
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/** @typedef {import("../Chunk")} Chunk */
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/** @typedef {import("../ChunkGraph")} ChunkGraph */
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/** @typedef {import("../Compilation").AssetInfo} AssetInfo */
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/** @typedef {import("../Compilation").PathData} PathData */
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/** @typedef {import("../Compiler")} Compiler */
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/** @typedef {import("../Module")} Module */
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/** @typedef {import("../ModuleGraph")} ModuleGraph */
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/** @typedef {import("../util/deterministicGrouping").GroupedItems<Module>} DeterministicGroupingGroupedItemsForModule */
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/** @typedef {import("../util/deterministicGrouping").Options<Module>} DeterministicGroupingOptionsForModule */
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/** @typedef {Record<string, number>} SplitChunksSizes */
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/**
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* @callback ChunkFilterFunction
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* @param {Chunk} chunk
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* @returns {boolean}
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*/
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/**
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* @callback CombineSizeFunction
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* @param {number} a
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* @param {number} b
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* @returns {number}
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*/
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/**
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* @typedef {Object} CacheGroupSource
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* @property {string=} key
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* @property {number=} priority
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* @property {GetName=} getName
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* @property {ChunkFilterFunction=} chunksFilter
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* @property {boolean=} enforce
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* @property {SplitChunksSizes} minSize
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* @property {SplitChunksSizes} minRemainingSize
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* @property {SplitChunksSizes} maxAsyncSize
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* @property {SplitChunksSizes} maxInitialSize
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* @property {number=} minChunks
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* @property {number=} maxAsyncRequests
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* @property {number=} maxInitialRequests
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* @property {(string | function(PathData, AssetInfo=): string)=} filename
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* @property {string=} idHint
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* @property {string} automaticNameDelimiter
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* @property {boolean=} reuseExistingChunk
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*/
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/**
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* @typedef {Object} CacheGroup
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* @property {string} key
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* @property {number=} priority
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* @property {GetName=} getName
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* @property {ChunkFilterFunction=} chunksFilter
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* @property {boolean=} enforce
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* @property {SplitChunksSizes} minSize
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* @property {SplitChunksSizes} minRemainingSize
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* @property {SplitChunksSizes} minSizeForMaxSize
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* @property {SplitChunksSizes} maxAsyncSize
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* @property {SplitChunksSizes} maxInitialSize
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* @property {number=} minChunks
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* @property {number=} maxAsyncRequests
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* @property {number=} maxInitialRequests
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* @property {(string | function(PathData, AssetInfo=): string)=} filename
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* @property {string=} idHint
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* @property {string} automaticNameDelimiter
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* @property {boolean=} reuseExistingChunk
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*/
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/**
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* @typedef {Object} FallbackCacheGroup
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* @property {SplitChunksSizes} minSize
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* @property {SplitChunksSizes} maxAsyncSize
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* @property {SplitChunksSizes} maxInitialSize
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* @property {string} automaticNameDelimiter
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*/
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/**
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* @typedef {Object} CacheGroupsContext
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* @property {ModuleGraph} moduleGraph
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* @property {ChunkGraph} chunkGraph
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*/
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/**
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* @callback GetCacheGroups
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* @param {Module} module
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* @param {CacheGroupsContext} context
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* @returns {CacheGroupSource[]}
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*/
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/**
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* @callback GetName
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* @param {Module=} module
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* @param {Chunk[]=} chunks
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* @param {string=} key
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* @returns {string=}
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*/
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/**
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* @typedef {Object} SplitChunksOptions
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* @property {ChunkFilterFunction} chunksFilter
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* @property {SplitChunksSizes} minSize
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* @property {SplitChunksSizes} minRemainingSize
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* @property {SplitChunksSizes} maxInitialSize
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* @property {SplitChunksSizes} maxAsyncSize
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* @property {number} minChunks
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* @property {number} maxAsyncRequests
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* @property {number} maxInitialRequests
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* @property {boolean} hidePathInfo
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* @property {string | function(PathData, AssetInfo=): string} filename
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* @property {string} automaticNameDelimiter
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* @property {GetCacheGroups} getCacheGroups
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* @property {GetName} getName
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* @property {FallbackCacheGroup} fallbackCacheGroup
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*/
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/**
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* @typedef {Object} ChunksInfoItem
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* @property {SortableSet<Module>} modules
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* @property {CacheGroup} cacheGroup
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* @property {string} name
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* @property {boolean} validateSize
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* @property {Record<string, number>} sizes
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* @property {Set<Chunk>} chunks
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* @property {Set<Chunk>} reuseableChunks
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* @property {Set<string>} chunksKeys
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*/
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const defaultGetName = /** @type {GetName} */ (() => {});
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const deterministicGroupingForModules = /** @type {function(DeterministicGroupingOptionsForModule): DeterministicGroupingGroupedItemsForModule[]} */ (deterministicGrouping);
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/**
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* @param {string} name a filename to hash
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* @returns {string} hashed filename
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*/
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const hashFilename = name => {
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return crypto
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.createHash("md4")
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.update(name)
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.digest("hex")
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.slice(0, 8);
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};
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/**
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* @param {Chunk} chunk the chunk
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* @returns {number} the number of requests
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*/
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const getRequests = chunk => {
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let requests = 0;
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for (const chunkGroup of chunk.groupsIterable) {
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requests = Math.max(requests, chunkGroup.chunks.length);
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}
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return requests;
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};
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/**
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* @template T
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* @param {Set<T>} a set
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* @param {Set<T>} b other set
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* @returns {boolean} true if at least one item of a is in b
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*/
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const isOverlap = (a, b) => {
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for (const item of a) {
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if (b.has(item)) return true;
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}
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return false;
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};
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const compareModuleIterables = compareIterables(compareModulesByIdentifier);
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/**
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* @param {ChunksInfoItem} a item
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* @param {ChunksInfoItem} b item
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* @returns {number} compare result
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*/
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const compareEntries = (a, b) => {
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// 1. by priority
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const diffPriority = a.cacheGroup.priority - b.cacheGroup.priority;
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if (diffPriority) return diffPriority;
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// 2. by number of chunks
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const diffCount = a.chunks.size - b.chunks.size;
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if (diffCount) return diffCount;
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// 3. by size reduction
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const aSizeReduce = totalSize(a.sizes) * (a.chunks.size - 1);
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const bSizeReduce = totalSize(b.sizes) * (b.chunks.size - 1);
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const diffSizeReduce = aSizeReduce - bSizeReduce;
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if (diffSizeReduce) return diffSizeReduce;
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// 4. by number of modules (to be able to compare by identifier)
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const modulesA = a.modules;
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const modulesB = b.modules;
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const diff = modulesA.size - modulesB.size;
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if (diff) return diff;
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// 5. by module identifiers
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modulesA.sort();
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modulesB.sort();
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return compareModuleIterables(modulesA, modulesB);
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};
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/**
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* @param {number} a first number
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* @param {number} b second number
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* @returns {number} the difference
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*/
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const compareNumbers = (a, b) => a - b;
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const INITIAL_CHUNK_FILTER = chunk => chunk.canBeInitial();
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const ASYNC_CHUNK_FILTER = chunk => !chunk.canBeInitial();
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const ALL_CHUNK_FILTER = chunk => true;
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/**
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* @param {OptimizationSplitChunksSizes} value the sizes
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* @returns {SplitChunksSizes} normalized representation
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*/
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const normalizeSizes = value => {
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if (typeof value === "number") {
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return {
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javascript: value,
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unknown: value
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};
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} else if (typeof value === "object" && value !== null) {
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return { ...value };
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} else {
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return {};
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}
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};
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/**
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* @param {...OptimizationSplitChunksSizes} sizes the sizes
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* @returns {SplitChunksSizes} the merged sizes
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*/
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const mergeSizes = (...sizes) => {
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/** @type {SplitChunksSizes} */
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let merged = {};
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for (let i = sizes.length - 1; i >= 0; i--) {
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merged = Object.assign(merged, normalizeSizes(sizes[i]));
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}
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return merged;
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};
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/**
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* @param {SplitChunksSizes} sizes the sizes
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* @returns {boolean} true, if there are sizes > 0
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*/
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const hasNonZeroSizes = sizes => {
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for (const key of Object.keys(sizes)) {
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if (sizes[key] > 0) return true;
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}
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return false;
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};
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/**
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* @param {SplitChunksSizes} a first sizes
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* @param {SplitChunksSizes} b second sizes
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* @param {CombineSizeFunction} combine a function to combine sizes
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* @returns {SplitChunksSizes} the combine sizes
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*/
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const combineSizes = (a, b, combine) => {
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const aKeys = new Set(Object.keys(a));
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const bKeys = new Set(Object.keys(b));
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/** @type {SplitChunksSizes} */
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const result = {};
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for (const key of aKeys) {
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if (bKeys.has(key)) {
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result[key] = combine(a[key], b[key]);
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} else {
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result[key] = a[key];
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}
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}
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for (const key of bKeys) {
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if (!aKeys.has(key)) {
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result[key] = b[key];
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}
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}
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return result;
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};
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/**
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* @param {SplitChunksSizes} sizes the sizes
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* @param {SplitChunksSizes} minSize the min sizes
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* @returns {boolean} true if there are sizes and all existing sizes are at least `minSize`
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*/
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const checkMinSize = (sizes, minSize) => {
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for (const key of Object.keys(minSize)) {
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const size = sizes[key];
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if (size === undefined || size === 0) continue;
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if (size < minSize[key]) return false;
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}
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return true;
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};
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/**
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* @param {SplitChunksSizes} sizes the sizes
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* @returns {number} the total size
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*/
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const totalSize = sizes => {
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let size = 0;
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for (const key of Object.keys(sizes)) {
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size += sizes[key];
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}
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return size;
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};
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/**
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* @param {false|string|Function} name the chunk name
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* @returns {GetName} a function to get the name of the chunk
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*/
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const normalizeName = name => {
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if (typeof name === "string") {
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return () => name;
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}
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if (typeof name === "function") {
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return /** @type {GetName} */ (name);
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}
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};
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/**
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* @param {"initial"|"async"|"all"|Function} chunks the chunk filter option
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* @returns {ChunkFilterFunction} the chunk filter function
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*/
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const normalizeChunksFilter = chunks => {
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if (chunks === "initial") {
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return INITIAL_CHUNK_FILTER;
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}
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if (chunks === "async") {
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return ASYNC_CHUNK_FILTER;
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}
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if (chunks === "all") {
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return ALL_CHUNK_FILTER;
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}
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if (typeof chunks === "function") {
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return /** @type {ChunkFilterFunction} */ (chunks);
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}
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};
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/**
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* @param {GetCacheGroups | Record<string, false|string|RegExp|OptimizationSplitChunksGetCacheGroups|OptimizationSplitChunksCacheGroup>} cacheGroups the cache group options
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* @returns {GetCacheGroups} a function to get the cache groups
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*/
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const normalizeCacheGroups = cacheGroups => {
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if (typeof cacheGroups === "function") {
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return cacheGroups;
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}
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if (typeof cacheGroups === "object" && cacheGroups !== null) {
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/**
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* @param {Module} module the current module
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* @param {CacheGroupsContext} context the current context
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* @returns {CacheGroupSource[]} the matching cache groups
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*/
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const fn = (module, context) => {
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/** @type {CacheGroupSource[]} */
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let results = [];
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for (const key of Object.keys(cacheGroups)) {
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let option = cacheGroups[key];
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if (option === false) {
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continue;
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}
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if (typeof option === "string" || option instanceof RegExp) {
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if (checkTest(option, module, context)) {
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results.push(
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createCacheGroupSource({
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key
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})
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);
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}
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} else if (typeof option === "function") {
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const result = option(module);
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if (result) {
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const groups = Array.isArray(result) ? result : [result];
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for (const group of groups) {
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results.push(createCacheGroupSource({ key, ...group }));
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}
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}
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} else {
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if (
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checkTest(option.test, module, context) &&
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checkModuleType(option.type, module)
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) {
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results.push(createCacheGroupSource({ key, ...option }));
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}
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}
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}
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return results;
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};
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return fn;
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}
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return () => null;
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};
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/**
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* @param {undefined|boolean|string|RegExp|Function} test test option
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* @param {Module} module the module
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* @param {CacheGroupsContext} context context object
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* @returns {boolean} true, if the module should be selected
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*/
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const checkTest = (test, module, context) => {
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if (test === undefined) return true;
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if (typeof test === "function") {
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return test(module, context);
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}
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if (typeof test === "boolean") return test;
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if (typeof test === "string") {
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const name = module.nameForCondition();
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return name && name.startsWith(test);
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}
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if (test instanceof RegExp) {
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const name = module.nameForCondition();
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return name && test.test(name);
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}
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return false;
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};
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/**
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* @param {undefined|string|RegExp|Function} test type option
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* @param {Module} module the module
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* @returns {boolean} true, if the module should be selected
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*/
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const checkModuleType = (test, module) => {
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if (test === undefined) return true;
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if (typeof test === "function") {
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return test(module.type);
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}
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if (typeof test === "string") {
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const type = module.type;
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return test === type;
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}
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if (test instanceof RegExp) {
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const type = module.type;
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return test.test(type);
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}
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return false;
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};
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/**
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* @typedef {Object} CacheGroupKey
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* @property {string} key
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*/
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|
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/**
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* @param {OptimizationSplitChunksCacheGroup&CacheGroupKey} options the group options
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* @returns {CacheGroupSource} the normalized cached group
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*/
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const createCacheGroupSource = options => {
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return {
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key: options.key,
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priority: options.priority,
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getName: normalizeName(options.name),
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chunksFilter: normalizeChunksFilter(options.chunks),
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enforce: options.enforce,
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minSize: normalizeSizes(options.minSize),
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minRemainingSize: mergeSizes(options.minRemainingSize, options.minSize),
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maxAsyncSize: mergeSizes(options.maxAsyncSize, options.maxSize),
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maxInitialSize: mergeSizes(options.maxInitialSize, options.maxSize),
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minChunks: options.minChunks,
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maxAsyncRequests: options.maxAsyncRequests,
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maxInitialRequests: options.maxInitialRequests,
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filename: options.filename,
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idHint: options.idHint,
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automaticNameDelimiter: options.automaticNameDelimiter,
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reuseExistingChunk: options.reuseExistingChunk
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};
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};
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module.exports = class SplitChunksPlugin {
|
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/**
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* @param {OptimizationSplitChunksOptions=} options plugin options
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*/
|
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constructor(options = {}) {
|
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const fallbackCacheGroup = options.fallbackCacheGroup || {};
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|
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/** @type {SplitChunksOptions} */
|
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this.options = {
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chunksFilter: normalizeChunksFilter(options.chunks || "all"),
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minSize: normalizeSizes(options.minSize),
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minRemainingSize: mergeSizes(options.minRemainingSize, options.minSize),
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maxAsyncSize: mergeSizes(options.maxAsyncSize, options.maxSize),
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maxInitialSize: mergeSizes(options.maxInitialSize, options.maxSize),
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minChunks: options.minChunks || 1,
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maxAsyncRequests: options.maxAsyncRequests || 1,
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maxInitialRequests: options.maxInitialRequests || 1,
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hidePathInfo: options.hidePathInfo || false,
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filename: options.filename || undefined,
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getCacheGroups: normalizeCacheGroups(options.cacheGroups),
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getName: options.name ? normalizeName(options.name) : defaultGetName,
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automaticNameDelimiter: options.automaticNameDelimiter,
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fallbackCacheGroup: {
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minSize: mergeSizes(fallbackCacheGroup.minSize, options.minSize),
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maxAsyncSize: mergeSizes(
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fallbackCacheGroup.maxAsyncSize,
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fallbackCacheGroup.maxSize,
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options.maxAsyncSize,
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options.maxSize
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),
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maxInitialSize: mergeSizes(
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fallbackCacheGroup.maxInitialSize,
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|
fallbackCacheGroup.maxSize,
|
|
options.maxInitialSize,
|
|
options.maxSize
|
|
),
|
|
automaticNameDelimiter:
|
|
fallbackCacheGroup.automaticNameDelimiter ||
|
|
options.automaticNameDelimiter ||
|
|
"~"
|
|
}
|
|
};
|
|
}
|
|
|
|
/**
|
|
* @param {Compiler} compiler webpack compiler
|
|
* @returns {void}
|
|
*/
|
|
apply(compiler) {
|
|
const associatedObjectForCache = compiler.root;
|
|
compiler.hooks.thisCompilation.tap("SplitChunksPlugin", compilation => {
|
|
const logger = compilation.getLogger("webpack.SplitChunksPlugin");
|
|
let alreadyOptimized = false;
|
|
compilation.hooks.unseal.tap("SplitChunksPlugin", () => {
|
|
alreadyOptimized = false;
|
|
});
|
|
compilation.hooks.optimizeChunks.tap(
|
|
{
|
|
name: "SplitChunksPlugin",
|
|
stage: STAGE_ADVANCED
|
|
},
|
|
chunks => {
|
|
if (alreadyOptimized) return;
|
|
alreadyOptimized = true;
|
|
logger.time("prepare");
|
|
const chunkGraph = compilation.chunkGraph;
|
|
const moduleGraph = compilation.moduleGraph;
|
|
// Give each selected chunk an index (to create strings from chunks)
|
|
const indexMap = new Map();
|
|
let index = 1;
|
|
for (const chunk of chunks) {
|
|
indexMap.set(chunk, index++);
|
|
}
|
|
const getKey = chunks => {
|
|
return Array.from(chunks, c => indexMap.get(c))
|
|
.sort(compareNumbers)
|
|
.join();
|
|
};
|
|
/** @type {Map<string, Set<Chunk>>} */
|
|
const chunkSetsInGraph = new Map();
|
|
for (const module of compilation.modules) {
|
|
const chunksKey = getKey(
|
|
chunkGraph.getModuleChunksIterable(module)
|
|
);
|
|
if (!chunkSetsInGraph.has(chunksKey)) {
|
|
chunkSetsInGraph.set(
|
|
chunksKey,
|
|
new Set(chunkGraph.getModuleChunksIterable(module))
|
|
);
|
|
}
|
|
}
|
|
|
|
// group these set of chunks by count
|
|
// to allow to check less sets via isSubset
|
|
// (only smaller sets can be subset)
|
|
/** @type {Map<number, Array<Set<Chunk>>>} */
|
|
const chunkSetsByCount = new Map();
|
|
for (const chunksSet of chunkSetsInGraph.values()) {
|
|
const count = chunksSet.size;
|
|
let array = chunkSetsByCount.get(count);
|
|
if (array === undefined) {
|
|
array = [];
|
|
chunkSetsByCount.set(count, array);
|
|
}
|
|
array.push(chunksSet);
|
|
}
|
|
|
|
// Create a list of possible combinations
|
|
/** @type {Map<string, Set<Chunk>[]>} */
|
|
const combinationsCache = new Map();
|
|
|
|
const getCombinations = key => {
|
|
const chunksSet = chunkSetsInGraph.get(key);
|
|
var array = [chunksSet];
|
|
if (chunksSet.size > 1) {
|
|
for (const [count, setArray] of chunkSetsByCount) {
|
|
// "equal" is not needed because they would have been merge in the first step
|
|
if (count < chunksSet.size) {
|
|
for (const set of setArray) {
|
|
if (isSubset(chunksSet, set)) {
|
|
array.push(set);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return array;
|
|
};
|
|
|
|
/**
|
|
* @typedef {Object} SelectedChunksResult
|
|
* @property {Chunk[]} chunks the list of chunks
|
|
* @property {string} key a key of the list
|
|
*/
|
|
|
|
/** @type {WeakMap<Set<Chunk>, WeakMap<ChunkFilterFunction, SelectedChunksResult>>} */
|
|
const selectedChunksCacheByChunksSet = new WeakMap();
|
|
|
|
/**
|
|
* get list and key by applying the filter function to the list
|
|
* It is cached for performance reasons
|
|
* @param {Set<Chunk>} chunks list of chunks
|
|
* @param {ChunkFilterFunction} chunkFilter filter function for chunks
|
|
* @returns {SelectedChunksResult} list and key
|
|
*/
|
|
const getSelectedChunks = (chunks, chunkFilter) => {
|
|
let entry = selectedChunksCacheByChunksSet.get(chunks);
|
|
if (entry === undefined) {
|
|
entry = new WeakMap();
|
|
selectedChunksCacheByChunksSet.set(chunks, entry);
|
|
}
|
|
/** @type {SelectedChunksResult} */
|
|
let entry2 = entry.get(chunkFilter);
|
|
if (entry2 === undefined) {
|
|
/** @type {Chunk[]} */
|
|
const selectedChunks = [];
|
|
for (const chunk of chunks) {
|
|
if (chunkFilter(chunk)) selectedChunks.push(chunk);
|
|
}
|
|
entry2 = {
|
|
chunks: selectedChunks,
|
|
key: getKey(selectedChunks)
|
|
};
|
|
entry.set(chunkFilter, entry2);
|
|
}
|
|
return entry2;
|
|
};
|
|
|
|
/** @type {Set<string>} */
|
|
const alreadyValidatedNames = new Set();
|
|
|
|
// Map a list of chunks to a list of modules
|
|
// For the key the chunk "index" is used, the value is a SortableSet of modules
|
|
/** @type {Map<string, ChunksInfoItem>} */
|
|
const chunksInfoMap = new Map();
|
|
|
|
/**
|
|
* @param {CacheGroup} cacheGroup the current cache group
|
|
* @param {Chunk[]} selectedChunks chunks selected for this module
|
|
* @param {string} selectedChunksKey a key of selectedChunks
|
|
* @param {Module} module the current module
|
|
* @returns {void}
|
|
*/
|
|
const addModuleToChunksInfoMap = (
|
|
cacheGroup,
|
|
selectedChunks,
|
|
selectedChunksKey,
|
|
module
|
|
) => {
|
|
// Break if minimum number of chunks is not reached
|
|
if (selectedChunks.length < cacheGroup.minChunks) return;
|
|
// Determine name for split chunk
|
|
const name = cacheGroup.getName(
|
|
module,
|
|
selectedChunks,
|
|
cacheGroup.key
|
|
);
|
|
// Check if the name is ok
|
|
if (!alreadyValidatedNames.has(name)) {
|
|
alreadyValidatedNames.add(name);
|
|
if (compilation.namedChunks.has(name)) {
|
|
compilation.errors.push(
|
|
new WebpackError(
|
|
"SplitChunksPlugin\n" +
|
|
`Cache group "${cacheGroup.key}" conflicts with existing chunk.\n` +
|
|
`Both have the same name "${name}".\n` +
|
|
"Use a different name for the cache group.\n" +
|
|
'HINT: You can omit "name" to automatically create a name.\n' +
|
|
"BREAKING CHANGE: webpack < 5 used to allow to use the " +
|
|
"entrypoint as splitChunk. This is no longer allowed. " +
|
|
"Remove this entrypoint and add modules to cache group's 'test' instead. " +
|
|
"If you need modules to be evaluated on startup, add them to the existing entrypoints (make them arrays). " +
|
|
"See migration guide of more info."
|
|
)
|
|
);
|
|
}
|
|
}
|
|
// Create key for maps
|
|
// When it has a name we use the name as key
|
|
// Elsewise we create the key from chunks and cache group key
|
|
// This automatically merges equal names
|
|
const key =
|
|
cacheGroup.key +
|
|
(name ? ` name:${name}` : ` chunks:${selectedChunksKey}`);
|
|
// Add module to maps
|
|
let info = chunksInfoMap.get(key);
|
|
if (info === undefined) {
|
|
chunksInfoMap.set(
|
|
key,
|
|
(info = {
|
|
modules: new SortableSet(
|
|
undefined,
|
|
compareModulesByIdentifier
|
|
),
|
|
cacheGroup,
|
|
name,
|
|
validateSize:
|
|
hasNonZeroSizes(cacheGroup.minSize) ||
|
|
hasNonZeroSizes(cacheGroup.minRemainingSize),
|
|
sizes: {},
|
|
chunks: new Set(),
|
|
reuseableChunks: new Set(),
|
|
chunksKeys: new Set()
|
|
})
|
|
);
|
|
}
|
|
info.modules.add(module);
|
|
if (info.validateSize) {
|
|
for (const type of module.getSourceTypes()) {
|
|
info.sizes[type] = (info.sizes[type] || 0) + module.size(type);
|
|
}
|
|
}
|
|
if (!info.chunksKeys.has(selectedChunksKey)) {
|
|
info.chunksKeys.add(selectedChunksKey);
|
|
for (const chunk of selectedChunks) {
|
|
info.chunks.add(chunk);
|
|
}
|
|
}
|
|
};
|
|
|
|
const context = {
|
|
moduleGraph,
|
|
chunkGraph
|
|
};
|
|
|
|
logger.timeEnd("prepare");
|
|
|
|
logger.time("modules");
|
|
|
|
// Walk through all modules
|
|
for (const module of compilation.modules) {
|
|
// Get cache group
|
|
let cacheGroups = this.options.getCacheGroups(module, context);
|
|
if (!Array.isArray(cacheGroups) || cacheGroups.length === 0) {
|
|
continue;
|
|
}
|
|
|
|
// Prepare some values
|
|
const chunksKey = getKey(
|
|
chunkGraph.getModuleChunksIterable(module)
|
|
);
|
|
let combs = combinationsCache.get(chunksKey);
|
|
if (combs === undefined) {
|
|
combs = getCombinations(chunksKey);
|
|
combinationsCache.set(chunksKey, combs);
|
|
}
|
|
|
|
for (const cacheGroupSource of cacheGroups) {
|
|
/** @type {CacheGroup} */
|
|
const cacheGroup = {
|
|
key: cacheGroupSource.key,
|
|
priority: cacheGroupSource.priority || 0,
|
|
chunksFilter:
|
|
cacheGroupSource.chunksFilter || this.options.chunksFilter,
|
|
minSize: mergeSizes(
|
|
cacheGroupSource.minSize,
|
|
cacheGroupSource.enforce ? undefined : this.options.minSize
|
|
),
|
|
minRemainingSize: mergeSizes(
|
|
cacheGroupSource.minRemainingSize,
|
|
cacheGroupSource.enforce
|
|
? undefined
|
|
: this.options.minRemainingSize
|
|
),
|
|
minSizeForMaxSize: mergeSizes(
|
|
cacheGroupSource.minSize,
|
|
this.options.minSize
|
|
),
|
|
maxAsyncSize: mergeSizes(
|
|
cacheGroupSource.maxAsyncSize,
|
|
cacheGroupSource.enforce
|
|
? undefined
|
|
: this.options.maxAsyncSize
|
|
),
|
|
maxInitialSize: mergeSizes(
|
|
cacheGroupSource.maxInitialSize,
|
|
cacheGroupSource.enforce
|
|
? undefined
|
|
: this.options.maxInitialSize
|
|
),
|
|
minChunks:
|
|
cacheGroupSource.minChunks !== undefined
|
|
? cacheGroupSource.minChunks
|
|
: cacheGroupSource.enforce
|
|
? 1
|
|
: this.options.minChunks,
|
|
maxAsyncRequests:
|
|
cacheGroupSource.maxAsyncRequests !== undefined
|
|
? cacheGroupSource.maxAsyncRequests
|
|
: cacheGroupSource.enforce
|
|
? Infinity
|
|
: this.options.maxAsyncRequests,
|
|
maxInitialRequests:
|
|
cacheGroupSource.maxInitialRequests !== undefined
|
|
? cacheGroupSource.maxInitialRequests
|
|
: cacheGroupSource.enforce
|
|
? Infinity
|
|
: this.options.maxInitialRequests,
|
|
getName:
|
|
cacheGroupSource.getName !== undefined
|
|
? cacheGroupSource.getName
|
|
: this.options.getName,
|
|
filename:
|
|
cacheGroupSource.filename !== undefined
|
|
? cacheGroupSource.filename
|
|
: this.options.filename,
|
|
automaticNameDelimiter:
|
|
cacheGroupSource.automaticNameDelimiter !== undefined
|
|
? cacheGroupSource.automaticNameDelimiter
|
|
: this.options.automaticNameDelimiter,
|
|
idHint:
|
|
cacheGroupSource.idHint !== undefined
|
|
? cacheGroupSource.idHint
|
|
: cacheGroupSource.key,
|
|
reuseExistingChunk: cacheGroupSource.reuseExistingChunk
|
|
};
|
|
// For all combination of chunk selection
|
|
for (const chunkCombination of combs) {
|
|
// Break if minimum number of chunks is not reached
|
|
if (chunkCombination.size < cacheGroup.minChunks) continue;
|
|
// Select chunks by configuration
|
|
const {
|
|
chunks: selectedChunks,
|
|
key: selectedChunksKey
|
|
} = getSelectedChunks(
|
|
chunkCombination,
|
|
cacheGroup.chunksFilter
|
|
);
|
|
|
|
addModuleToChunksInfoMap(
|
|
cacheGroup,
|
|
selectedChunks,
|
|
selectedChunksKey,
|
|
module
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
logger.timeEnd("modules");
|
|
|
|
logger.time("queue");
|
|
|
|
// Filter items were size < minSize
|
|
for (const pair of chunksInfoMap) {
|
|
const info = pair[1];
|
|
if (
|
|
info.validateSize &&
|
|
!checkMinSize(info.sizes, info.cacheGroup.minSize)
|
|
) {
|
|
chunksInfoMap.delete(pair[0]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @typedef {Object} MaxSizeQueueItem
|
|
* @property {SplitChunksSizes} minSize
|
|
* @property {SplitChunksSizes} maxAsyncSize
|
|
* @property {SplitChunksSizes} maxInitialSize
|
|
* @property {string} automaticNameDelimiter
|
|
* @property {string[]} keys
|
|
*/
|
|
|
|
/** @type {Map<Chunk, MaxSizeQueueItem>} */
|
|
const maxSizeQueueMap = new Map();
|
|
|
|
while (chunksInfoMap.size > 0) {
|
|
// Find best matching entry
|
|
let bestEntryKey;
|
|
let bestEntry;
|
|
for (const pair of chunksInfoMap) {
|
|
const key = pair[0];
|
|
const info = pair[1];
|
|
if (
|
|
bestEntry === undefined ||
|
|
compareEntries(bestEntry, info) < 0
|
|
) {
|
|
bestEntry = info;
|
|
bestEntryKey = key;
|
|
}
|
|
}
|
|
|
|
const item = bestEntry;
|
|
chunksInfoMap.delete(bestEntryKey);
|
|
|
|
let chunkName = item.name;
|
|
// Variable for the new chunk (lazy created)
|
|
/** @type {Chunk} */
|
|
let newChunk;
|
|
// When no chunk name, check if we can reuse a chunk instead of creating a new one
|
|
let isExistingChunk = false;
|
|
let isReusedWithAllModules = false;
|
|
if (chunkName) {
|
|
const chunkByName = compilation.namedChunks.get(chunkName);
|
|
if (chunkByName !== undefined) {
|
|
newChunk = chunkByName;
|
|
item.chunks.delete(newChunk);
|
|
isExistingChunk = true;
|
|
}
|
|
} else if (item.cacheGroup.reuseExistingChunk) {
|
|
outer: for (const chunk of item.chunks) {
|
|
if (
|
|
chunkGraph.getNumberOfChunkModules(chunk) !==
|
|
item.modules.size
|
|
) {
|
|
continue;
|
|
}
|
|
if (chunkGraph.getNumberOfEntryModules(chunk) > 0) {
|
|
continue;
|
|
}
|
|
for (const module of item.modules) {
|
|
if (!chunkGraph.isModuleInChunk(module, chunk)) {
|
|
continue outer;
|
|
}
|
|
}
|
|
if (!newChunk || !newChunk.name) {
|
|
newChunk = chunk;
|
|
} else if (
|
|
chunk.name &&
|
|
chunk.name.length < newChunk.name.length
|
|
) {
|
|
newChunk = chunk;
|
|
} else if (
|
|
chunk.name &&
|
|
chunk.name.length === newChunk.name.length &&
|
|
chunk.name < newChunk.name
|
|
) {
|
|
newChunk = chunk;
|
|
}
|
|
}
|
|
if (newChunk) {
|
|
item.chunks.delete(newChunk);
|
|
chunkName = undefined;
|
|
isExistingChunk = true;
|
|
isReusedWithAllModules = true;
|
|
}
|
|
}
|
|
|
|
// Skip when no chunk selected
|
|
// TODO check if this check is really needed, shouldn't chunks always be non-empty?
|
|
if (item.chunks.size === 0 && !isExistingChunk) continue;
|
|
|
|
// Check if maxRequests condition can be fulfilled
|
|
// TODO try to avoid creating a new array here
|
|
const usedChunks = Array.from(item.chunks);
|
|
|
|
let validChunks = usedChunks;
|
|
|
|
if (
|
|
Number.isFinite(item.cacheGroup.maxInitialRequests) ||
|
|
Number.isFinite(item.cacheGroup.maxAsyncRequests)
|
|
) {
|
|
validChunks = validChunks.filter(chunk => {
|
|
// respect max requests when not enforced
|
|
const maxRequests = chunk.isOnlyInitial()
|
|
? item.cacheGroup.maxInitialRequests
|
|
: chunk.canBeInitial()
|
|
? Math.min(
|
|
item.cacheGroup.maxInitialRequests,
|
|
item.cacheGroup.maxAsyncRequests
|
|
)
|
|
: item.cacheGroup.maxAsyncRequests;
|
|
return (
|
|
!isFinite(maxRequests) || getRequests(chunk) < maxRequests
|
|
);
|
|
});
|
|
}
|
|
|
|
validChunks = validChunks.filter(chunk => {
|
|
for (const module of item.modules) {
|
|
if (chunkGraph.isModuleInChunk(module, chunk)) return true;
|
|
}
|
|
return false;
|
|
});
|
|
|
|
if (validChunks.length < usedChunks.length) {
|
|
if (isExistingChunk) validChunks.push(newChunk);
|
|
if (validChunks.length >= item.cacheGroup.minChunks) {
|
|
for (const module of item.modules) {
|
|
addModuleToChunksInfoMap(
|
|
item.cacheGroup,
|
|
validChunks,
|
|
getKey(validChunks),
|
|
module
|
|
);
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
|
|
// Validate minRemainingSize constraint when a single chunk is left over
|
|
if (
|
|
validChunks.length === 1 &&
|
|
hasNonZeroSizes(item.cacheGroup.minRemainingSize)
|
|
) {
|
|
const chunk = validChunks[0];
|
|
const chunkSizes = { ...chunkGraph.getChunkModulesSizes(chunk) };
|
|
for (const key of Object.keys(item.sizes)) {
|
|
chunkSizes[key] -= item.sizes[key];
|
|
}
|
|
if (!checkMinSize(chunkSizes, item.cacheGroup.minRemainingSize)) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// Create the new chunk if not reusing one
|
|
if (!isExistingChunk) {
|
|
newChunk = compilation.addChunk(chunkName);
|
|
}
|
|
// Walk through all chunks
|
|
for (const chunk of usedChunks) {
|
|
// Add graph connections for splitted chunk
|
|
chunk.split(newChunk);
|
|
}
|
|
|
|
// Add a note to the chunk
|
|
newChunk.chunkReason =
|
|
(newChunk.chunkReason ? newChunk.chunkReason + ", " : "") +
|
|
(isReusedWithAllModules
|
|
? "reused as split chunk"
|
|
: "split chunk");
|
|
if (item.cacheGroup.key) {
|
|
newChunk.chunkReason += ` (cache group: ${item.cacheGroup.key})`;
|
|
}
|
|
if (chunkName) {
|
|
newChunk.chunkReason += ` (name: ${chunkName})`;
|
|
// If the chosen name is already an entry point we remove the entry point
|
|
const entrypoint = compilation.entrypoints.get(chunkName);
|
|
if (entrypoint) {
|
|
compilation.entrypoints.delete(chunkName);
|
|
entrypoint.remove();
|
|
chunkGraph.disconnectEntries(newChunk);
|
|
}
|
|
}
|
|
if (item.cacheGroup.filename) {
|
|
newChunk.filenameTemplate = item.cacheGroup.filename;
|
|
}
|
|
if (item.cacheGroup.idHint) {
|
|
newChunk.idNameHints.add(item.cacheGroup.idHint);
|
|
}
|
|
if (!isReusedWithAllModules) {
|
|
// Add all modules to the new chunk
|
|
for (const module of item.modules) {
|
|
if (!module.chunkCondition(newChunk, compilation)) continue;
|
|
// Add module to new chunk
|
|
chunkGraph.connectChunkAndModule(newChunk, module);
|
|
// Remove module from used chunks
|
|
for (const chunk of usedChunks) {
|
|
chunkGraph.disconnectChunkAndModule(chunk, module);
|
|
}
|
|
}
|
|
} else {
|
|
// Remove all modules from used chunks
|
|
for (const module of item.modules) {
|
|
for (const chunk of usedChunks) {
|
|
chunkGraph.disconnectChunkAndModule(chunk, module);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (
|
|
Object.keys(item.cacheGroup.maxAsyncSize).length > 0 ||
|
|
Object.keys(item.cacheGroup.maxInitialSize).length > 0
|
|
) {
|
|
const oldMaxSizeSettings = maxSizeQueueMap.get(newChunk);
|
|
maxSizeQueueMap.set(newChunk, {
|
|
minSize: oldMaxSizeSettings
|
|
? combineSizes(
|
|
oldMaxSizeSettings.minSize,
|
|
item.cacheGroup.minSizeForMaxSize,
|
|
Math.max
|
|
)
|
|
: item.cacheGroup.minSize,
|
|
maxAsyncSize: oldMaxSizeSettings
|
|
? combineSizes(
|
|
oldMaxSizeSettings.maxAsyncSize,
|
|
item.cacheGroup.maxAsyncSize,
|
|
Math.min
|
|
)
|
|
: item.cacheGroup.maxAsyncSize,
|
|
maxInitialSize: oldMaxSizeSettings
|
|
? combineSizes(
|
|
oldMaxSizeSettings.maxInitialSize,
|
|
item.cacheGroup.maxInitialSize,
|
|
Math.min
|
|
)
|
|
: item.cacheGroup.maxInitialSize,
|
|
automaticNameDelimiter: item.cacheGroup.automaticNameDelimiter,
|
|
keys: oldMaxSizeSettings
|
|
? oldMaxSizeSettings.keys.concat(item.cacheGroup.key)
|
|
: [item.cacheGroup.key]
|
|
});
|
|
}
|
|
|
|
// remove all modules from other entries and update size
|
|
for (const [key, info] of chunksInfoMap) {
|
|
if (isOverlap(info.chunks, item.chunks)) {
|
|
if (info.validateSize) {
|
|
// update modules and total size
|
|
// may remove it from the map when < minSize
|
|
let updated = false;
|
|
for (const module of item.modules) {
|
|
if (info.modules.has(module)) {
|
|
// remove module
|
|
info.modules.delete(module);
|
|
// update size
|
|
for (const key of module.getSourceTypes()) {
|
|
info.sizes[key] -= module.size(key);
|
|
}
|
|
updated = true;
|
|
}
|
|
}
|
|
if (updated) {
|
|
if (info.modules.size === 0) {
|
|
chunksInfoMap.delete(key);
|
|
continue;
|
|
}
|
|
if (!checkMinSize(info.sizes, info.cacheGroup.minSize)) {
|
|
chunksInfoMap.delete(key);
|
|
}
|
|
}
|
|
} else {
|
|
// only update the modules
|
|
for (const module of item.modules) {
|
|
info.modules.delete(module);
|
|
}
|
|
if (info.modules.size === 0) {
|
|
chunksInfoMap.delete(key);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
logger.timeEnd("queue");
|
|
|
|
logger.time("maxSize");
|
|
|
|
/** @type {Set<string>} */
|
|
const incorrectMinMaxSizeSet = new Set();
|
|
|
|
// Make sure that maxSize is fulfilled
|
|
for (const chunk of Array.from(compilation.chunks)) {
|
|
const chunkConfig = maxSizeQueueMap.get(chunk);
|
|
const {
|
|
minSize,
|
|
maxAsyncSize,
|
|
maxInitialSize,
|
|
automaticNameDelimiter
|
|
} = chunkConfig || this.options.fallbackCacheGroup;
|
|
/** @type {SplitChunksSizes} */
|
|
let maxSize;
|
|
if (chunk.isOnlyInitial()) {
|
|
maxSize = maxInitialSize;
|
|
} else if (chunk.canBeInitial()) {
|
|
maxSize = combineSizes(maxAsyncSize, maxInitialSize, Math.min);
|
|
} else {
|
|
maxSize = maxAsyncSize;
|
|
}
|
|
if (Object.keys(maxSize).length === 0) {
|
|
continue;
|
|
}
|
|
for (const key of Object.keys(maxSize)) {
|
|
const maxSizeValue = maxSize[key];
|
|
const minSizeValue = minSize[key];
|
|
if (
|
|
typeof minSizeValue === "number" &&
|
|
minSizeValue > maxSizeValue
|
|
) {
|
|
const keys = chunkConfig && chunkConfig.keys;
|
|
const warningKey = `${keys &&
|
|
keys.join()} ${minSizeValue} ${maxSizeValue}`;
|
|
if (!incorrectMinMaxSizeSet.has(warningKey)) {
|
|
incorrectMinMaxSizeSet.add(warningKey);
|
|
compilation.warnings.push(
|
|
new MinMaxSizeWarning(keys, minSizeValue, maxSizeValue)
|
|
);
|
|
}
|
|
}
|
|
}
|
|
const results = deterministicGroupingForModules({
|
|
minSize,
|
|
maxSize: Object.keys(maxSize).reduce((obj, key) => {
|
|
const minSizeValue = minSize[key];
|
|
obj[key] =
|
|
typeof minSizeValue === "number"
|
|
? Math.max(maxSize[key], minSizeValue)
|
|
: maxSize[key];
|
|
return obj;
|
|
}, Object.create(null)),
|
|
items: chunkGraph.getChunkModulesIterable(chunk),
|
|
getKey(module) {
|
|
const ident = contextify(
|
|
compilation.options.context,
|
|
module.identifier(),
|
|
associatedObjectForCache
|
|
);
|
|
const nameForCondition =
|
|
module.nameForCondition && module.nameForCondition();
|
|
const name = nameForCondition
|
|
? contextify(
|
|
compilation.options.context,
|
|
nameForCondition,
|
|
associatedObjectForCache
|
|
)
|
|
: ident.replace(/^.*!|\?[^?!]*$/g, "");
|
|
const fullKey =
|
|
name + automaticNameDelimiter + hashFilename(ident);
|
|
return requestToId(fullKey);
|
|
},
|
|
getSize(module) {
|
|
const size = Object.create(null);
|
|
for (const key of module.getSourceTypes()) {
|
|
size[key] = module.size(key);
|
|
}
|
|
return size;
|
|
}
|
|
});
|
|
if (results.length === 0) {
|
|
continue;
|
|
}
|
|
results.sort((a, b) => {
|
|
if (a.key < b.key) return -1;
|
|
if (a.key > b.key) return 1;
|
|
return 0;
|
|
});
|
|
for (let i = 0; i < results.length; i++) {
|
|
const group = results[i];
|
|
const key = this.options.hidePathInfo
|
|
? hashFilename(group.key)
|
|
: group.key;
|
|
let name = chunk.name
|
|
? chunk.name + automaticNameDelimiter + key
|
|
: null;
|
|
if (name && name.length > 100) {
|
|
name =
|
|
name.slice(0, 100) +
|
|
automaticNameDelimiter +
|
|
hashFilename(name);
|
|
}
|
|
if (i !== results.length - 1) {
|
|
const newPart = compilation.addChunk(name);
|
|
chunk.split(newPart);
|
|
newPart.chunkReason = chunk.chunkReason;
|
|
// Add all modules to the new chunk
|
|
for (const module of group.items) {
|
|
if (!module.chunkCondition(newPart, compilation)) {
|
|
continue;
|
|
}
|
|
// Add module to new chunk
|
|
chunkGraph.connectChunkAndModule(newPart, module);
|
|
// Remove module from used chunks
|
|
chunkGraph.disconnectChunkAndModule(chunk, module);
|
|
}
|
|
} else {
|
|
// change the chunk to be a part
|
|
chunk.name = name;
|
|
}
|
|
}
|
|
}
|
|
logger.timeEnd("maxSize");
|
|
}
|
|
);
|
|
});
|
|
}
|
|
};
|